Fire-alarm attachment



(No Model.)

0. E. EGAN. FIRE ALARM ATTACHMENT.

Patented Jan. 9, 1894.

UNITED STATES PATENT OFFICE.

CHARLES E. EGAN, OF CHICAGO, ILLINOIS.

FIRE-ALARM ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 512,672, dated January 9, 1894.

Application filed May 27,1893.

To aZZ whom it may concern:

Be it known that I, OnARLEs E. EGAN, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful ImprovementsinFire-Alarm Attachments, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to electric alarms or annunciators for use in hotels and other buildings, and consists in an improved construction in which the alarm mechanism is automatic in operation, in case of fire, and may also be used by the occupant of a room for calling purposes. V

In the accompanying drawings Figure 1 represents a vertical section of a device for closing and breaking a circuit, embodying my improvements. Fig. 2 is a plan view of the device, the push-button and housing in which it is mounted being removed. Fig. 3 is a bottom plan of the device.

A designates a circular block which forms the base, the said block being made somewhat hollow to receive a circular, corrugated disk at which is secured therein. Under the disk a is secured a cross-barb, some space being left between the disk and said bar. A screw 0 is carried by the bar I), being passed through the bar and held in position for contact with the disk a,in case the latter should be expanded byheatin the event of fire. The screw 0 may be adjusted on the bar, in proximity to the disk, according to the temperature required. Two binding posts cl, d, are mounted on the block A and extend down in the same, the lower extremity of said post d being connected by wire 6, with the cross-bar b. Two conducting wires f, f, are connected with the posts 01, d, respectively and are run to and connected with an annunciator, not shown, which has connection with an electric source of supply.

Centrally mounted on a raised portion or Serial No. 75,693. (No model.)

offset g, of the block A, is a contact piece 7;, which is connected bya wire 2', with the binding post (1, at the lower end of said post. An elastic arm- 7c is mounted on the offset 6, in position for contact with the piece 71, when said arm is pressed down. Connection of the arm is with the post d is formed by a wire o".

C indicates a push button which is placed on the arm k, and the said button and the devices mounted on the ofiset g, are inclosed by a shell or removable housing D. The said housing and the ofiset are threaded, so that the former may be screwed on the latter, as seen in Fig. 1. A chamber or air-space I, about and under the button C, is formed by the housing as shown. Lateral openings on are made in the block A for the admission of heated air to the disk to, in case of tire.

In case the occupant of a room, in which the device is set, desires to send a call to the room in which the annunciator is located, he presses the push-button, thus closing the circuit by means of the arm k and contact piece h.

I claim- The combination with a block having a chamber provided with side openings formed therein, a corrugated disk in said chamber, a cross-bar with an adjustable screw, in position to bear against said disk when the latter is expanded by heat, a contact piece and an elastic arm, mounted on said block, a push button, a housing for said button, removably secured to said block, two binding posts, two conducting wires, forming connections of said posts with said elastic arm and said contact piece, and two wires connecting said posts severally with said cross-bar and said corrugated disk, substantially as set forth and described.

In testimony whereof I have affixed my signature in presence of two witnesses.

CHARLES E. EGAN.

Witnesses:

GRAHAM P. J ONES, GEORGE P. J ONES. 

